/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.harmony.security.x509;

import java.io.IOException;
import java.math.BigInteger;

import org.apache.harmony.security.asn1.ASN1Integer;

/**
 * InhibitAnyPolicy Certificate Extension (OID = 2.5.29.54) Its ASN.1 notation
 * is as follows:
 * 
 * <pre>
 *  id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::=  { id-ce 54 }
 * 
 *  InhibitAnyPolicy ::= SkipCerts
 * 
 *  SkipCerts ::= INTEGER (0..MAX)
 * </pre>
 * 
 * (as specified in RFC 3280 http://www.ietf.org/rfc/rfc3280.txt).
 */
public class InhibitAnyPolicy extends ExtensionValue {

	// the value of the extension
	private final int skipCerts;

	/**
	 * Creates an object on the base of its encoded form.
	 */
	public InhibitAnyPolicy(byte[] encoding) throws IOException {
		super(encoding);
		skipCerts = new BigInteger((byte[]) ASN1Integer.getInstance().decode(
				encoding)).intValue();
	}

	/**
	 * Create the object on the base of SkipCerts value.
	 */
	public InhibitAnyPolicy(int skipCerts) {
		this.skipCerts = skipCerts;
	}

	/**
	 * Places the string representation of extension value into the StringBuffer
	 * object.
	 */
	@Override
	public void dumpValue(StringBuffer buffer, String prefix) {
		buffer.append(prefix).append("Inhibit Any-Policy: ") //$NON-NLS-1$
				.append(skipCerts).append('\n');
	}

	/**
	 * Returns ASN.1 encoded form of the object.
	 * 
	 * @return a byte array containing ASN.1 encoded form.
	 */
	@Override
	public byte[] getEncoded() {
		if (encoding == null) {
			encoding = ASN1Integer.getInstance().encode(
					ASN1Integer.fromIntValue(skipCerts));
		}
		return encoding;
	}

	/**
	 * Return the value of the extension.
	 */
	public int getSkipCerts() {
		return skipCerts;
	}
}
